2.1-20

Question 1

What occurs in a reciprocating aircraft engine during detonation?

Answer 1

The unburned charge in the cylinders explodes instead of burning normally

Detonation can lead to engine damage and reduced performance.

Question 2

When does detonation typically occur at high power settings?

Answer 2

The fuel mixture ignites spontaneously instead of burning progressively and evenly

This can lead to increased engine temperatures and potential failure.

Question 3

What should a pilot do if they suspect engine detonation during climb-out after takeoff?

Answer 3

Lower the nose slightly to increase airspeed

Increasing airspeed can help cool the engine and reduce the risk of detonation.

Question 4

What is the likely consequence of using a lower grade of fuel than specified for an aircraft engine?

Answer 4

Detonation

Using the correct fuel grade is critical for engine performance and safety.

Question 5

What is the term for the uncontrolled firing of the fuel/air charge in advance of normal spark ignition?

Answer 5

Pre-ignition

Pre-ignition can occur due to hot spots in the combustion chamber.

Question 8

In the Northern Hemisphere, a magnetic compass will normally indicate a turn to the north if

Answer 8

an aircraft is accelerated while on an east or west heading.

Question 9

Deviation in a magnetic compass is caused by the

Answer 9

magnetic fields within the aircraft distorting the lines of magnetic force.

Question 10

During flight, when are the indications of a magnetic compass accurate?

Answer 10

Only in straight-and-level unaccelerated flight.

Question 11

Deviation error of the magnetic compass is caused by

Answer 11

certain metals and electrical systems in the aircraft.

Question 12

In the Northern Hemisphere, when the aircraft is accelerated or decelerated, the magnetic compass will normally indicate

Answer 12

correctly when on a north or south heading.

Question 13

In the Northern Hemisphere, a magnetic compass will initially indicate a turn towards the west if

Answer 13

a right turn is entered from a north heading.

Question 14

In the Northern Hemisphere, a magnetic compass will initially indicate a turn towards the south when

Answer 14

the aircraft is decelerated while on a west heading.

Question 15

What should be the indication on the magnetic compass as you roll into a standard rate turn to the right from a south heading in the Northern Hemisphere?

Answer 15

The compass will indicate a turn to the right, but at a faster rate than is actually occurring.

Question 16

The pitot system provides impact pressure for which instrument?

Answer 16

Airspeed indicator.

Question 17

Which instrument will become inoperative if the pitot tube becomes clogged?

Answer 17

Airspeed indicator.

Question 18

If the pitot tube and outside static vents become clogged, which instruments would be affected?

Answer 18

the altimeter, the airspeed indicator, and the vertical speed indicator.

Question 19

Which instruments will become inoperative if the static vents become clogged?

Answer 19

airspeed indicator, altimeter, vertical speed indicator.

Question 20

What is absolute altitude?

Answer 20

The vertical distance of the aircraft above the surface.

Question 21

What is true altitude?

Answer 21

The vertical distance of the aircraft above sea level.

Question 22

What is density altitude?

Answer 22

The pressure altitude corrected for nonstandard temperature.

Question 23

What is pressure altitude?

Answer 23

The altitude indicated when the barometric pressure scale is set to 29.92.

Question 24

Altimeter setting is the value to which the barometric pressure scale of the altimeter is set so the altimeter indicates

Answer 24

true altitude at field elevation.

Question 25

Under what condition is indicated altitude the same as true altitude?

Answer 25

When at sea level under standard conditions.

Question 26

Under what condition is pressure altitude and density altitude the same value?

Answer 26

At standard temperature.

Question 27

Under what condition will pressure altitude be equal to true altitude?

Answer 27

When standard atmospheric conditions exist.

Question 28

If it is necessary to set the altimeter from 29.15 to 29.85, what change occurs?

Answer 28

When increasing the altimeter setting from 29.15 to 29.85, the indicated altitude increases by 700 feet.

Question 29

If a pilot changes the altimeter setting from 30.11 to 29.96, what is the approximate change in indication?

Answer 29

Altimeter will indicate 150 feet lower.

Question 30

If a flight is made from an area of low pressure into an area of high pressure without the altimeter setting being adjusted, the altimeter will indicate

Answer 30

lower than the actual altitude above sea level.

Question 31

If a flight is made from an area of high pressure into an area of lower pressure without the altimeter setting being adjusted, the altimeter will indicate

Answer 31

higher than the actual altitude above sea level.

Question 32

Which condition would cause the altimeter to indicate a lower altitude than true altitude?

Answer 32

Air temperature warmer than standard.

Question 33

Under what condition will true altitude be lower than indicated altitude?

Answer 33

In colder than standard air temperature.

Question 34

How do variations in temperature affect the altimeter?

Answer 34

Pressure levels are raised on warm days and the indicated altitude is lower than true altitude.

Question 35

A turn coordinator provides an indication of the

Answer 35

movement of the aircraft about the yaw and roll axes.

Question 36

To receive accurate indications during flight from a heading indicator, the instrument must be

Answer 36

periodically realigned with the magnetic compass as the gyro precesses.

Question 37

The proper adjustment to make on the attitude indicator during level flight is to align the

Answer 37

miniature airplane to the horizon bar.

Question 38

How should a pilot determine the direction of bank from an attitude indicator such as the one illustrated?

Answer 38

By the relationship of the miniature airplane to the deflected horizon bar.

Question 39

What is the benefit of flying with a glass flight deck?

Answer 39

Situational awareness is increased.

Question 40

What steps must be taken when flying with a glass flight deck to ensure safe flight?

Answer 40

Regularly scan both inside and outside, use all appropriate checklists, and cross-check with other forms of information.

Question 41

An aircraft which is equipped with an electronic flight display can

Answer 41

offer new capabilities and simplify the basic flying task.

Question 42

You are flying an aircraft equipped with an electronic flight display and the air data computer fails. What instrument is affected?

Answer 42

airspeed indicator.

Question 43

An abnormally high engine oil temperature may be caused by

Answer 43

the oil level being too low.

Question 44

Excessively high engine temperatures will

Answer 44

cause loss of power, excessive oil consumption, and possible permanent internal engine damage.

Question 45

For internal cooling, air cooled engines are especially dependent on

Answer 45

the circulation of lubricating oil.

Question 46

If the engine oil temperature and cylinder head temperature gauges have exceeded their normal operating range, the pilot may have been operating with

Answer 46

too much power and with the mixture set too lean.

Question 47

What action can a pilot take to aid in cooling an engine that is overheating during a climb?

Answer 47

Reduce rate of climb and increase airspeed.

Question 48

What is one procedure to aid in cooling an engine that is overheating?

Answer 48

Enrich the fuel mixture.

Question 49

How is engine operation controlled on an engine equipped with a constant-speed propeller?

Answer 49

The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulates engine RPM.

Question 50

A precaution for the operation of an engine equipped with a constant-speed propeller is to

Answer 50

avoid high manifold pressure settings with low RPM.

Question 51

What is an advantage of a constant-speed propeller?

Answer 51

Permits pilot to select blade angle for most efficient performance.

Question 52

One purpose of the dual ignition system on an aircraft engine is to provide for

Answer 52

improved engine performance.

Question 53

If the ignition switch ground wire becomes disconnected, the magneto

Answer 53

may continue to fire.

Question 54

The reason a 4-cylinder reciprocating engine continues to run after the ignition switch is positioned to OFF may be a

Answer 54

broken magneto ground wire.

Question 55

With regard to carburetor ice, float-type carburetor systems in comparison to fuel injection systems are generally considered to be

Answer 55

more susceptible to icing.

Question 56

Which condition is most favorable to the development of carburetor icing?

Answer 56

Temperatures between 20F and 70F and high humidity.

Question 57

The possibility of carburetor icing exists even when the ambient air temperature is as

Answer 57

when the temperature is 70F and relative humidity is high.

Question 58

If an aircraft is equipped with a fixed-pitch propeller and a float-type carburetor, the first indication of carburetor ice would most likely be

Answer 58

decrease in RPM.

Question 59

The operating principle of float-type carburetors is based on the

Answer 59

difference in air pressure at the venturi throat and the air inlet.

Question 60

The presence of carburetor ice in an aircraft equipped with a fixed-pitch propeller can be verified by applying carburetor heat and noting

Answer 60

decrease in RPM and then a gradual increase in RPM.

Question 61

Generally speaking, the use of carburetor heat tends to

Answer 61

decrease engine performance.

Question 62

Applying carburetor heat will

Answer 62

enrich the fuel/air mixture.

Question 63

What change occurs in the fuel/air mixture when carburetor heat is applied?

Answer 63

the fuel/air mixture becomes richer.

Question 64

During the run-up at a high-elevation airport, a pilot notes a slight engine roughness that is not affected by the magneto check but grows worse during the carburetor heat check. Under these circumstances, what would be the most logical initial action?

Answer 64

Check the results obtained with a leaner setting of the mixture.

Question 65

The basic purpose of adjusting the fuel/air mixture at altitude is to

Answer 65

decrease fuel flow to compensate for decrease in air density.

Question 66

While cruising at 9,500 feet MSL, the fuel/air mixture is properly adjusted. What will occur if a descent to 4,500 feet MSL is made without readjusting the mixture?

Answer 66

The fuel/air mixture may become excessively lean.

Question 67

Fuel/air ratio is the ratio between the

Answer 67

weight of fuel and weight of air entering the cylinder.

Question 68

What type fuel can be substituted for an aircraft if the recommended octane is not available?

Answer 68

the next higher octane aviation gas.

Question 69

Filling the fuel tanks after the last flight of the day is considered a good operating procedure because this will

Answer 69

Prevent moisture condensation by eliminating airspace in the tanks.

Question 70

To properly purge water from the fuel system of an aircraft equipped with fuel tank sumps and a fuel strainer quick drain, it is necessary to drain fuel from the

Answer 70

fuel strainer drain and the fuel tank sumps.

Question 71

On aircraft equipped with fuel pumps, when is the auxiliary electric driven pump used?

Answer 71

in the event engine-driven fuel pump fails.

Question 72

Which would most likely cause the cylinder head temperature and engine oil temperature gauges to exceed their normal operating ranges?

Answer 72

Using fuel that has a lower-than-specified fuel rating.

Question 73

What should be the first action after starting the aircraft engine?

Answer 73

Adjust for proper RPM and check for desired indications on the engine gauges.

Question 74

During preflight in cold weather, crankcase breather lines should receive special attention because they are susceptible to being clogged by

Answer 74

ice from crankcase vapors that have condensed and subsequently frozen.

Question 75

An electrical system failure (battery and alternator) occurs during flight. In this situation, you would

Answer 75

experience avionics equipment failure.

Question 76

A positive indication on an ammeter

Answer 76

shows the rate of charge on the battery.

Question 77

To keep a battery charged, the alternator voltage output should be

Answer 77

higher than the battery voltage.

Question 78

Which of the following is a true statement concerning electrical systems?

Answer 78

lights and radios use the electrical system for power.